







Two equations with fractions 
20201022 

mia pose la question : I am supposed to look for x and y. my teacher didn't explain very well. please help : ((
2x  y = 5
x/4 + y/3= 2 Penny Nom lui répond. 





A system of equations. 
20200427 

solomon pose la question : xy + x =28
x + y +4 Penny Nom lui répond. 





Simultaneous equations 
20191016 

deepak pose la question : This is too complicated please help me
8/x  10/y = 1 and x+y=9 Penny Nom lui répond. 





Simultaneous equations with fractions 
20181214 

zaheer pose la question : solve simultaneous equations and give answer in fractional form
3x  2 = 4y +5/3
y + 7 = 2x + 4
would really appreciate some help on this please Penny Nom lui répond. 





Simultaneous equations with fractions 
20170909 

Farah pose la question : Hi, my name is Farah. I hope you can help me with this question . X/2 + g/5= 3 and 2g  f = 10 Penny Nom lui répond. 





Simultaneous equations 
20170902 

keto pose la question : xy=2,x^2+xy=12 Penny Nom lui répond. 





Simultaneous equations with fractions 
20170602 

Jamal pose la question : 1/x + 1/y =5 and 1/y  1/x =1 Penny Nom lui répond. 





Five equations 
20170116 

Muhammed pose la question : A x 4 = E
B ÷ 4 = E
C + 4 = E
D  4 = E
___________
& A + B + C + D = 100
what is the value of E Penny Nom lui répond. 





Simultaneous equations with fractions 
20161221 

Kimi pose la question : I am stuck on this,can someone please help me????
1/2x+1/3y=11
8x+2/5y=102
Can someone please explain how to solve questions like these??
Or else I will never learn...
Thank you Penny Nom lui répond. 





Simultaneous equations 
20161125 

Rohan pose la question : x2/3 + y  1/4 = 13/12
2x/2 + 3 + y/3 = 11/6 Penny Nom lui répond. 





Two equations with fractions 
20160722 

kanesh pose la question : p/2+q/3=3
p/4+2q/3=3 Penny Nom lui répond. 





Simultaneous equations 
20160625 

sena pose la question : 2x/3+3y/2=1
4x5y=22
simultaneous equation Penny Nom lui répond. 





A pair of equations with fractions 
20160511 

tiya pose la question : hello, i want to know how to solve this question.
m/6+2n/3=6
m/10=2n/5=2 Penny Nom lui répond. 





Solve for x and y 
20160227 

ntshidi pose la question : Y=1/2x+4and1/4x6 Penny Nom lui répond. 





Two equations in two unknowns 
20160213 

Anumba pose la question : 4x + 2y = 4
7x  y = 11 Penny Nom lui répond. 





A system of linear equations 
20160124 

kareem pose la question : my name is kareem
and i am a student i have a math puzzle and i tried to solved it but it always have same mistake
xy=9
x+z=12
zn=14
y+n=2 Penny Nom lui répond. 





Constructing simultaneous linear equations 
20151228 

Deborah pose la question : Linda thinks of a twodigit number. The sum of the digits is 8. If she reverses the digits, the new number is 36 greater than her original number. What was Linda's original number?
Thank you! Penny Nom lui répond. 





Linear equations in two variables 
20151213 

priya pose la question : I have problem in solving these equations please help me today itself very urgent:
I)2x+y=y
II)pie*x+y=9 Penny Nom lui répond. 





The method of elimination 
20150501 

oreanna pose la question :
Question from oreanna, a student:
How do u solve 2x+9y=3
7x4y=25 in elimination Penny Nom lui répond. 





A word problem with fractions 
20150409 

Lorraine pose la question : If the numerator of a certain fraction is doubled and the denominator is increased by 1, the fraction becomes 1/2.
If the numerator of the original faction is squared and the denominator is decreased by 2, the fraction becomes equal to 1.
Let x be the numerator and let y be the denominator of the original fraction.
Write down two simultaneous equation in x and y.
Solve these equations to find two possible values for the given fraction. Penny Nom lui répond. 





Two equations with fractions 
20150226 

Pulane pose la question : Hi math centre I've been trying to solve these equations for days now please help
(6/x)(1/y)=4
(9/x)+1=(2/y)
Please help me solve them simultaneously
Thank you Penny Nom lui répond. 





Two equations 
20150216 

nigel pose la question : 2x+1/2y=1
6x3/2y=21 Penny Nom lui répond. 





A linear system 
20141014 

pheter pose la question : 4/x  1/y = 3 .... equation (1)
6/x  2/y = 5 .... equation (2) Penny Nom lui répond. 





Two equations in x and y 
20140925 

seyilogo pose la question : solve y=2x  3 and (4x  2y) / x + y = 1 simultaneously Harley Weston lui répond. 





Two equations in two variables 
20140918 

Susan pose la question : (28x + 36y)  [20000  .75(28x + 36y) + 60000] = 5000
x + y = 10000
solving two equations involving variables Penny Nom lui répond. 





The method of elimination 
20140705 

leo pose la question : please explain how can i solve this problem
3x6y=38
6x9y=44
using elimination and simultaneous method thank you :) Penny Nom lui répond. 





Simultaneous equations 
20140620 

rana pose la question : solve the simultaneous equations
a)3x=7y
12y=5x1 Penny Nom lui répond. 





Simultaneous equations with fractions 
20140419 

Maryam pose la question : I looked at your example of simultaneous equations with fractions and applied it to my question from an educate exam papers but I couldn't get it to work. The question is:
x/8  y = 5/2
3x + y/3 = 13 Penny Nom lui répond. 





Simultaneous fractional equations 
20140215 

benjamin pose la question : hi math central. benjamin here. during class, i had problem with this topic. normally i wont have problems with math but this topic i just too hard for me. please help i am having exam and test next week on this topic
here is the question:
using substitution method, solve the simultaneous equation.
(x+1)/(y+2)=0.5
(x2)/(y1)=1/3 Penny Nom lui répond. 





Two nonlinear equations 
20140126 

Naryn pose la question : (1÷x) + (1÷y) = (7÷12)
xy = 12 Penny Nom lui répond. 





Substitution type simultaneous equations 
20131103 

Kayla pose la question : I am having problems with substitution type simultaneous equations, when the variable you are substituting is a algebraic one:
y=x^23x+4 and 3x2y=1
I have rearranged 3x2y=1 to get x=(1+2y)/3 but when I substitute this x value into the other equation, I get the wrong answers!
Would appreciate any help! Thank you. Penny Nom lui répond. 





Simultaneous equations 
20130710 

Warren pose la question : solve this simultaneous equation: xy=4
2x+3y=14 Penny Nom lui répond. 





4 linear equations with 3 unknowns 
20130412 

Marian pose la question : how to solve for 3 unknowns in 4 simultaneous equations Penny Nom lui répond. 





Simultaneous equations with fractions 
20130331 

Terence pose la question : 5/x6/y=1
17/x+30/y=16
I been spending whole day to solve this question. Would be very grateful if you can help I try
The denominator value is a equations term which make is simultaneous equations so hard. Penny Nom lui répond. 





A word problem involving toys 
20130214 

sandy pose la question : Each boy gets 5 toys.Each girl gets 3 toys.There are 150 pupils.
The boys had 74 more toys than girls.
How many boys?
How many girls? Penny Nom lui répond. 





Simultaneous equations 
20130210 

Michael pose la question : 2P + 1/3V =8
3P  2/V=5 Penny Nom lui répond. 





A word problem involving a fraction 
20121012 

Derrick pose la question : If the numerator and denominator of a fraction are both decreased by 1 the fraction becomes 2/3. If the numerator and denominator are both increased by 1 the fraction will be 3/4. Find the original fraction. How to do? Penny Nom lui répond. 





Eliminate y 
20110407 

Lynn pose la question : 2x + y = 8
y + 3z =5
z + 2w =1
5w + 3x = 9
Form three equations with y eliminated Penny Nom lui répond. 





Simultaneous equations 
20101205 

ryan pose la question :
Question from ryan, a student:
3 4
   = 1 (1)
x y
7 2 11
   =  (2)
x y 12 Chris Fisher and Stephen La Rocque lui répond. 





A pair of simultaneous equations 
20100109 

Yumiko pose la question : Solve the following pair of simultaneous equations.
x^2 4x = y^24
3y=2x  3 Penny Nom lui répond. 





Solving two equations, one with a square root 
20091123 

kacie pose la question : y = square root of x+3
x4y = 7
im having trouble with this problem...i have to find where they intersect. Harley Weston lui répond. 





Simultaneous equations 
20090828 

onias pose la question : solve 3/a  2/b = 1/2 , 5/a + 3/b = 29/12 Robert Dawson lui répond. 





Simultaneous Equations 
20090706 

Mukulu pose la question : Solve the equation simultaneously X/5=(Y+2)/2= (Z1)/4 ……………….eqt 1
3X+4Y+2Z25=0 ………………eqt 2 Janice Cotcher lui répond. 





Simultaneous equations with an xy term 
20090201 

angelee pose la question : xy+5x2y10=0
2x+y=1 Penny Nom lui répond. 





Two equations in two unknowns 
20081017 

Dushayne pose la question : Please help me in solving this problem:
a. 3x4y=32
5x+2y=10
b. 2x+3y=11
4x+3y=10 Penny Nom lui répond. 





Simultaneous equations 
20080723 

Franco pose la question : Solve
3 D + E  F = 10
2 D  F = 4
3 D  4 E  F = 25
Franco Penny Nom lui répond. 





Simultaneous equations 
20080229 

CONOR pose la question : I was wondering if you could help me with this problem
7x  5y = 1
3y = 4x Penny Nom lui répond. 





System of equations 
20071206 

Jenn pose la question : change the equation,xy=4 to form y=mx+b
the solution to the system of equations y=2x and y=x+3 is Stephen La Rocque lui répond. 





Chicken and goat feet 
20071205 

Kim pose la question : Old McDonald raises goats and chickens. The animals have a total of
100 heads adn 360 feet. How many goats and how many chickens does Mr.
McDonald have? Stephen La Rocque and Penny Nom lui répond. 





Four triangles in a square 
20071015 

Kristina pose la question : A square with side lengths of 6 cm is divided into 3 right triangles and a larger isosceles triangle. If the three right triangles have equal area, find the exact area of the isosceles triangle. Stephen La Rocque lui répond. 





Substitution method 
20071011 

Kevin pose la question : 3xx+2y=36y=11 Stephen La Rocque lui répond. 





Coin jar 
20071007 

a student pose la question : Sally empties his jar of coins. It contains $3.75 in nickels, dimes, and
quarters. The number of dimes is twice the number of nickels and the number
of quarters is three less than the number of nickels. Determine how many nickels,
dimes, and quarters were in the in the jar. Stephen La Rocque lui répond. 





Solving four simultaneous equations (system of four linear equations) 
20071007 

Johan pose la question : I need some help in solving this question
x + 2y  3z + 4w = 12
2x + 2y  2z + 3w = 10
0 + y + z + 0 = 1
x  y + z  2w = 4 Stephen La Rocque lui répond. 





Finding equations, intersection point of two lines at right angles 
20070922 

Yaz pose la question : Find the equation of the line joining A(1,9) to B(6,120). Another line passes through C(7,5) and meets AB at rigth angle of D. Find the euation of CD and calculate the coordinates of D. Stephen La Rocque lui répond. 





Finding the radius of an inscribed circle 
20070705 

Maria pose la question : I need to find the radius of a circle which is inscribed inside an obtuse triangle ABC. I know all the angles and all the lengths of the triangle. Stephen La Rocque and Chris Fisher lui répond. 





Simultaneous equations : the Elimination method 
20070621 

Patricia pose la question : I need to find the value of X and Y using the Elimination method.
5/x + 3/y=4
25/x2/y=3 Stephen La Rocque lui répond. 





Simultaneous inequalities 
20070618 

Freddy pose la question : Watson Electric has production facilities in Valley Mills, Marlin,and Hillsboro.
Each one produces radios,stereos,and TV sets.
There production capacities are
Valley Mills: 10 radios, 12 stereos, and 6 TV sets per hour
Marlin: 7 radios, 10 stereos, and 8 TV sets per hour
Hillsboro: 5 Radios, 4 Stereos, amid 13 TV sets per hour
QUESTION
How many hours should each plant be scheduled to fill an order of 1095 radios, 1230 stereos,
and 1490 TV sets? Stephen La Rocque lui répond. 





Angles of depression 
20070613 

Phonda pose la question : The pilot of a small private plane can look forward and see the control tower for a small airstrip. Beyond that is a large factory that is 3 milies from the airstrip. The angles of depression are 12.5 degrees and 4.8 degrees respectively.
Find the airplane's altitude, to the nearest ten feet. Stephen La Rocque lui répond. 





System of equations 
20070524 

Chris pose la question : Find all real solutions (x,y,z,w) of the system of equations:
2y= x + x/17, 2z= y + y/17, 2w = z + z/17, 2x= w + w/17 Penny Nom lui répond. 





Set up two simultaneous equations 
20070521 

Admire pose la question : The cost of producing windscreen wipers blades at a factory ais partly fixed (due to operating overheads) and partly dependent on the number of blades produced. It costs $300 to produce 1000, and $600 to produce 5000 blades. How much would it cost to produce 24000 blades? Penny Nom lui répond. 





A tugboat's speed 
20070430 

Amanda pose la question : a tugboat must travel 24 miles against a 4 mile per hour current on the Potomac River and return. At what
constant speed must the tugboat travel to make the trip in 12 hours. Round answer to the nearest tenth mph. Stephen La Rocque lui répond. 





Simultaneous equations 
20070416 

kyrie pose la question : simultaneous equation
4x + 3y = 21
2x * y = 8 Penny Nom lui répond. 





Simultaneous equations with fractions 
20070228 

Alyca pose la question : Hello Math Central, I am a grade 10 student taking Academic math. Our unit right now is method of substitution and elimination. I'm stuck on this one question that I've been doing forever. Please help =)
*For this equation I have to do method of elimination, but it's so much harder with fractions...could some one please explain to me how to do it step by step?* x y 2    =   3 6 3 x y 1    = 1 12 4 2
Steve La Rocque and Ashley Mang lui répond. 





Simultaneous equations with envelopes 
20070208 

Mick pose la question : There were 17 envelopes bought, some were brown, some were white. The brown envelopes cost one cent more per envelope than the white ones. The total cost was 80 cents. How much of each type of envelope was bought? Many thanks! Stephen La Rocque lui répond. 





The substitution method 
20070131 

Victoria pose la question : how do i solve this problem using the substitution method? 2x5= 14 7x+14y= 5 Stephen La Rocque lui répond. 





The elimination method 
20070131 

Addrianna pose la question : x2y=2 3x5y=7 Stephen La Rocque lui répond. 





Simultaneous equations 
20061106 

An other pose la question : e^2yx+2=0 ln(x+3)2y1=0 Penny Nom lui répond. 





Simultaneous Equations 
20060524 

Angie pose la question :
Question: solve the equations
2x3yz=0
3x2y+z=5
x+3y2z=14
for x,y,z
Stephen La Rocque lui répond. 





2x+5y=3 And x+3y=7 
20060403 

Lloyd pose la question : simplify 2x+5y=3 And x+3y=7
Penny Nom lui répond. 





2x+3y=0 and 3xy=0 
20060314 

Lisa pose la question : my name is lisa I am doing math for work and i have a math problem to solve and i need help with it here is the question 2x+3y=0 and 3xy=0 this is one question can you help me please Penny Nom lui répond. 





One boundary of a pond is parabolic in shape. 
20060120 

Glenn pose la question : One boundary of a pond is parabolic in shape. The boundary passes through the points A(20,45), B(40,40) and E(30,35). The equation of the parabola is of the form y=ax2+bx+c. Find the equation of the parabola and the coordinates of the vertex of the parabola. Any assistance you could provide would be greatly appreciated. Penny Nom lui répond. 





Simultaneous Equations 
20051221 

Matt pose la question : I have these two equations,
336 = 60a + 10b
and
432 = 84a + 6b
Am I right in saying both a and b are 4.8? Penny Nom lui répond. 





Simultaneous equations 
20051013 

Daniel pose la question : 5x + 3y = 22
4x  7y = 20 Penny Nom lui répond. 





Two equations 
20020726 

Derek pose la question : 1. 3x + 2y = 4 2. 7x + 2y = 24 finding x and y. Penny Nom lui répond. 





Pairs of equations 
20020404 

A student pose la question :
high school level student is asking
y=4x x=4y
x+y=5 3x+2y=20
y=x1 3xy=4
x+y=3 2x3y=9
x+5y=4
3x+15y=1
. . .
Penny Nom lui répond. 





The substitution method 
20020224 

Joe pose la question : whats the answer to this question? 3x+y=11 x+2y=3 its substitution method i am having alot of trouble figuring it out. send the answer as soon as possible. thank you Penny Nom lui répond. 





Simultaneous equations 
20011217 

Matthew pose la question : 4x + y = 4 2x  3y = 5 what is x and y Penny Nom lui répond. 





Two equations in two unknowns 
20011204 

Courtney pose la question : y = 3x + 2 y = 4x  5
solve for x Penny Nom lui répond. 





Common solution 
20010602 

Samantha pose la question :
 Solve for common solution: x+y=6 2x3y=2
 Solve for y in terms of x: 3xy=4
Penny Nom lui répond. 





Where do the lines y=2x4 and y=x1 intesect? 
20010406 

Bryce pose la question : solve the following problem by setting them equal to each other. Solve for x and y. Where do the lines y=2x4 and y=x1 intesect? Penny Nom lui répond. 





Systems of equations 
20010316 

joy pose la question : How do u solve problems using systems of equations? ~ finding x and y~ ex:
26 = 3x  2y 42 = 4x + y Penny Nom lui répond. 





The substitution method 
20010305 

A student pose la question : Solve each system of equations by the substitution method. Show your work.  y = 8
7x = 1  y
 y = x  1
4x  y = 19 Penny Nom lui répond. 





Two linear equations 
20000914 

David Dean pose la question : 2a + 1b = 3.39 3a + 3b = 6.59 What formula do I use to find what a = ? Harley Weston lui répond. 





Simultaneous equations 
20000311 

Laura Molck pose la question : My name is Laura Molck and I am in Year 11 in Australia. Please help me with the following. I know that they are all simultaneous equations which I can do but I have trouble with the formulae to work the equations. Can you please help!! 1. A tent manufacturer produces 2 models, Outback and Bushwalker. From earlier sales records it is known that 20% more of the Outback model is sold than the Bushwalker. A profit of $200 is made on each Outback sold, but $350 is made on each Bushwalker. If during the next year a profit of $177,000 is planned how many of each model must be sold? Penny Nom lui répond. 





Systems of linear equations 
20000310 

Ann Marie Devereux pose la question : hi there!!, I guess I have a problem!!! 3x+4y=10 (over) 4x+y=9 2x=5y+3 (over) x=3y+1 Penny Nom lui répond. 





Systems of equations 
19991206 

Roger Hornbaker pose la question : I am having problem figuring out x and y solutions.  5x + y = 4
3x  y = 4  3x + 2y = 6
 3x + y = 0 Penny Nom lui répond. 

